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人体在靠近固定医疗 RTLS 或用于监测个人防护设备的 I-RFID 读取器附近暴露于 866MHz 电磁场时的吸收建模与评估。

Modelling and Evaluation of the Absorption of the 866 MHz Electromagnetic Field in Humans Exposed near to Fixed I-RFID Readers Used in Medical RTLS or to Monitor PPE.

机构信息

Laboratory of Electromagnetic Hazards, Central Institute for Labour Protection-National Research Institute (CIOP-PIB), Czerniakowska 16, 00-701 Warszawa, Poland.

Eye and Face Protection Laboratory, Central Institute for Labour Protection-National Research Institute (CIOP-PIB), Czerniakowska 16, 00-701 Warszawa, Poland.

出版信息

Sensors (Basel). 2021 Jun 21;21(12):4251. doi: 10.3390/s21124251.

DOI:10.3390/s21124251
PMID:34205808
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8233764/
Abstract

The aim of this study was to model and evaluate the Specific Energy Absorption Rate (SAR) values in humans in proximity to fixed multi-antenna I-RFID readers of passive tags under various scenarios mimicking exposure when they are incorporated in Real-Time Location Systems (RTLS), or used to monitor Personal Protective Equipment (PPE). The sources of the electromagnetic field (EMF) in the modelled readers were rectangular microstrip antennas at a resonance frequency in free space of 866 MHz from the ultra-high frequency (UHF) RFID frequency range of 865-868 MHz. The obtained results of numerical modelling showed that the SAR values in the body 5 cm away from the UHF RFID readers need consideration with respect to exposure limits set by international guidelines to prevent adverse thermal effects of exposure to EMF: when the effective radiated power exceeds 5.5 W with respect to the general public/unrestricted environments exposure limits, and with respect to occupational/restricted environments exposure limits, when the effective radiated power exceeds 27.5 W.

摘要

本研究旨在模拟和评估在各种场景下，当固定多天线无源 RFID 读写器近距离接近人体时，特定吸收率 (SAR) 值，这些场景模拟了将其纳入实时定位系统 (RTLS) 或用于监测个人防护设备 (PPE) 时的暴露情况。模型中读写器的电磁场 (EMF) 源为矩形微带天线，在自由空间中的谐振频率为 866 MHz，来自超高频 (UHF) RFID 频率范围 865-868 MHz。数值建模的结果表明，需要考虑距 UHF RFID 读写器 5 厘米处的 SAR 值，以符合国际指南规定的暴露限制，以防止暴露于电磁场产生的不利热效应：当有效辐射功率超过国际指南规定的公众/非限制环境暴露限制的 5.5 W 时，以及当有效辐射功率超过职业/限制环境暴露限制的 27.5 W 时。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/e66cb30b2e41/sensors-21-04251-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/45cc0066015e/sensors-21-04251-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/89e421aa1b66/sensors-21-04251-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/02e00d3de633/sensors-21-04251-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/1ab08f721f7a/sensors-21-04251-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/44bf5b6f547b/sensors-21-04251-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/d781501c06a8/sensors-21-04251-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/e66cb30b2e41/sensors-21-04251-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/45cc0066015e/sensors-21-04251-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/89e421aa1b66/sensors-21-04251-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/02e00d3de633/sensors-21-04251-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/1ab08f721f7a/sensors-21-04251-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/44bf5b6f547b/sensors-21-04251-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/d781501c06a8/sensors-21-04251-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/327a/8233764/e66cb30b2e41/sensors-21-04251-g007.jpg

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